Easy Explanation: In the settings menu if a tower is faded, it will never show up when you generate random towers. It's the same for the game modes, just click on randomize when you're ready. Click randomize to generate random towers to use. Use the towers that are shown in the project in the game. If you want to turn on or off certain towers, go into settings and disable or enable them. You can also chose which game modes appear, and how many towers are generated (you can also set it to random amounts). The left, middle, and right label tells you which map to pick during voting (you don't have to play with this if you don't want to). If you need more help, in settings there are ? boxes that will give you more advice.